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Metadata V16: Implement support for Pallet View Functions (#1981)

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* Support Pallet View Functions in Subxt

* fmt

* clippy

* Move a little view function logic to subxt_core

* clippy

* Add back check that prob isnt needed

* avoid vec macro in core

* Add view funciton test and apply various fixes to get it working

* Add test for dynamic view fn call and fix issues

* clippy

* fix test-runtime

* fmt

* remove export

* avoid vec for nostd core

* use const instead of fn for view fn call name

* Update to support latest unstable metadata

* Update metadata stripping tests for new v16 version
This commit is contained in:
James Wilson
2025-04-24 14:42:07 +01:00
committed by GitHub
parent 21b3f52191
commit 4524590821
28 changed files with 875 additions and 108 deletions
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metadata/src/utils/validation.rs
+6 -6
View File
@@ -6,8 +6,8 @@
use crate::{
CustomMetadata, CustomValueMetadata, ExtrinsicMetadata, Metadata, PalletMetadata,
PalletViewFunctionMetadata, RuntimeApiMetadata, RuntimeApiMethodMetadata, StorageEntryMetadata,
StorageEntryType,
RuntimeApiMetadata, RuntimeApiMethodMetadata, StorageEntryMetadata, StorageEntryType,
ViewFunctionMetadata,
};
use alloc::vec::Vec;
use hashbrown::HashMap;
@@ -406,12 +406,12 @@ pub fn get_runtime_apis_hash(trait_metadata: RuntimeApiMetadata) -> Hash {
})
}
/// Obtain the hash of a specific pallet view function, or an error if it's not found.
pub fn get_pallet_view_function_hash(view_function: &PalletViewFunctionMetadata) -> Hash {
/// Obtain the hash of a specific view function, or an error if it's not found.
pub fn get_view_function_hash(view_function: &ViewFunctionMetadata) -> Hash {
let registry = view_function.types;
// The Query ID is `twox_128(pallet_name) ++ twox_128("fn_name(fnarg_types) -> return_ty")`.
let mut bytes = view_function.query_id();
let mut bytes = *view_function.query_id();
// This only takes type _names_ into account, so we beef this up by combining with actual
// type hashes, in a similar approach to runtime APIs..
@@ -439,7 +439,7 @@ fn get_pallet_view_functions_hash(pallet_metadata: &PalletMetadata) -> Hash {
// be identical regardless. For this, we can just XOR the hashes for each method
// together; we'll get the same output whichever order they are XOR'd together in,
// so long as each individual method is the same.
xor(bytes, get_pallet_view_function_hash(&method_metadata))
xor(bytes, get_view_function_hash(&method_metadata))
})
}